I don't see any mention of the engine, though the VIN indicates the van has a 5.4L gas engine.
You are probably correct the ad changed, it said 7.3 Powerstroke at the top when I saw it this morning. If it is not a diesel then it is not a good deal, I got my 5.4 for way less than that with lower miles.
"The problem with common sense is, its not that common." Mark Twain
1999 F-250SD XCab 4x4 5.4 170k
1998 E-350 LWB (Being converted now) www.DirkMitchell.com